Imaginary Picture of K2-290 c

Display orbital revolution of K2-290 c around the hoststar K2-290
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Exoplanet Name : K2-290 c
Alternate Name : "EPIC 249624646 c, 2MASS J15392585-2011557 c, TYC 6193-663-1 c, WISE J153925.88-201155.9 c"
Status : Confirmed
Radius (Rjup / Re): 1.0060 (Rjup) 11.2763 (Rearth)
Mass (Mjup / Me): 0.7740 (Mjup) 246.0840 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.3050 (AU) 0.3050 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1324
Orbital Period(Observed/Estimated) 48.37 (Days Obs.) 56.40 (Days Est.)
Surface Gravity (G Earth) 1.9353
Star Radiation at Atmospheric Boundary: 47410.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 658.6 (K)
Blackbody T 0.3(K) 618.5 (K)
Blackbody T 0.7(K) 500.4 (K)
Tidally Locked Blackbody T 0.1(K) 783.2 (K)
Tidally Locked Blackbody T 0.3(K) 735.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-290
Alternate Name : "EPIC 249624646, 2MASS J15392585-2011557, TYC 6193-663-1, WISE J153925.88-201155.9"
Star Distance(LY) : 896.9
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.6 (Msun Estimated)
Star Age : 4.0 (GY)
Temperature : 6302 (K)
Spectral type : F8
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.1
Absolute Magnitude: 2.8
Apparent Magnitude: 10.0
Right Ascension(RA) 234.8578
Declination (DEC) -20.1988
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
K2-290 c
K2-290 c

  • K2-290 c is an exoplanet orbiting the star K2-290, located about 896.9 light-years (275.0 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-290 has apparent magnitude of 10.0, with absolute magnitude of 2.8.
  • It is 1.2 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6302 with its spectral types of F8
  • In this planetary system, the extrasolar planet K2-290 c orbits around the star K2-290 every 48.4 days with its orbital distance of 0.30 AU ( 45627350.6 km)
  • (Projected orbit of K2-290 c around its host star K2-290)


  • The Star K2-290 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.299 AU ( 194353272.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.796 AU ( 268647013.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.736 AU ( 409358596.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.027 AU ( 602389107.5 km)
  • Radiation at Planetary Boundary of K2-290 c : 47410.29 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-290)



  • Kopparapu Recent Venus for Star K2-290 distance : 1.304 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-290 distance : 1.652 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-290 distance : 1.595 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-290 distance : 1.748 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-290 distance : 2.883 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-290 distance : 3.041 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-290)



  • Original Kopparapu Recent Venus for Star K2-290 distance : 1.321 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-290 distance : 1.694 AU
  • Original Kopparapu Moist Greenhouse for Star K2-290 distance : 1.748 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-290 distance : 2.935 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-290 distance : 3.052 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-290)



    (Position in Stellar Map of star K2-290 and its Exoplanet K2-290 c)



    (Zoomed position in Stellar Map of star K2-290 and its Exoplanet K2-290 c (zoom level 3))

    (Synthetic Spectrum of star K2-290*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102